34-year-old American woman, Kathryn Mayorga, from Nevada accused the star of raping her in the penthouse suite of a Las Vegas hotel in 2009.

Ronaldo has since denied the allegation and has his lawyers are saying they will sue German magazine, Der Spiegel who first published the story.

The Italian side signed the Portugal captain from Real Madrid for 112m euro (£99m; $130) in July – a move which helped the club’s share price soar 180% to a peak of more than 1.80 euro a share in September.

But at the close of markets on Friday, they had dropped to 1.19 euro which translates to 9.92% drop.

It comes after both sports companies, EA Sports and Nike, who have lucrative sponsorship deals with Ronaldo, said they were ‘monitoring the situation closely’.

The club’s Twitter handle had earlier posted a message in solidarity with Ronaldo saying:

.@Cristiano Ronaldo has shown in recent months his great professionalism and dedication, which is appreciated by everyone at Juventus. 1/1